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Article
An evaluation the sealing ability of a three retro-filling materials

Author: Raghad A. Mohammed رغد محمد
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2005 Volume: 17 Issue: 2 Pages: 5-7
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Retro end filling is important to establish a seal between the root canal space and the periapical tissue. The purpose of this in vitro study was to evaluate the quality of seals obtained with various retro-grade filling materials using dye penetration method of micro leakage measurement.Materials and methods: Forty extracted human single rooted teeth were used. Following root canal obturation, 30 teeth were divided into three experimental groups and each group was subjected to one of the three filling techniques: acold burnishing of gutta percha, bcalcium phosphate cement, csuper EBA cement. The remaining 10 teeth were considered as a control group. The teeth were placed in methylene blue dye for a period of 10 days after which they were washed, sectioned and the apical dye penetration measured.Results: The results showed that (CPC) and super EBA cement demonstrated less dye penetration than other experimental groups; the difference was statistically significant as compared with groups 1 & 4 and not significant as compared between groups 2&3.Conclusion: A general trend was observed that the apical leakage was found in all teeth but with different degrees, some leaked more than others, dye penetration was more with the cold burnished gutta percha


Article
Fluoride Ions Release Study Of Different GIF Materials .

Author: Dr. Raid Fahim Salman Ph.D., M.Sc., B.D.S د.رائد فاهم
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2009 Volume: 6 Issue: 3 Pages: 198-202
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

AbstractThe purpose of this in vitro study was to compare & measure the release of fluoride ions from set tested materials, CGI (Pro-med), MGI (Ketac molar), and LCGI (Vitremer).The tested materials were made as molds with certain dimensions and each mold was placed in vial containing 100 ml. of DDW. Every 24 hrs, 5 ml. of the solution was transferred into smaller tubes to measure the fluoride release using spectrophotometer. This procedure was repeated every 24 hrs. for 14 days.The results revealed that the CGI (conventional glass ionomer) had higher release over other materials, then the MGI (modified glass ionomer) material, and finally the LCGI (light cure glass ionomer) with significant differences between them at P< 0.05.The MGI material had higher fluoride ions release concentrations over the LCGI. However, the CGI had higher fluoride ions release concentrations over other materials.


Article
Stuitability of Injana Clay For Filling Materials In Earth Fill Dams In Sharqat Distric/ Salah Alden North Iraq.
صلاحية اطيان انجانة كمواد املائية في السدود الترابية في قضاء الشرقاط / صلاح الدين / شمال العراق

Author: لؤي موسى راوي
Journal: Tikrit Journal of Pure Science مجلة تكريت للعلوم الصرفة ISSN: 18131662 Year: 2016 Volume: 21 Issue: 2 Pages: 143-150
Publisher: Tikrit University جامعة تكريت

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Abstract

The Study Aims To Study The Suitability of Injana Clays In North East Sharqat Governorate For Filling Materials In Earth Fill Dams. Three Stations Were Chosed Which Reflect The Study Area.The Laboratory Test Show Matching The Curve Of Zone (C) With The Curve Of Grain Size Analysis, The Ratios Of Liquid Limits And Plastic Limits Ranges Between (44.5- 47.155)% And (12.7- 19)% Respectively The Ratios Of Total Dissolved Salts And Gypsum Content Ranges Between (2.61- 4.1)% and (0.10- 0.21)% Respectively And According To Iraqi Standard Specification (SORB/R5 2003) The Clays Of Injana Formetion Are Suilable For Filling Materials In Earth Fill Dams.

يهدف البحث الى دراسة صلاحية اطيان تكوين انجانة المنكشفة في شمال شرق قضاء الشرقاط كمواد املائية في السدود الترابية, حيث تمت النمذجة من ثلاث محطات ممثلة لمنطقة الدراسة ووفقا للتحليل الحجمي الحبيبي تبين انطباق المنحني (Zone c) لجميع النماذج المدروسة مع منحني التحليل الحجمي ومن خلال الفحوصات الفيزيائية والمتمثلة بحد السيولة ومعامل اللدونة وجد ان جميع النماذج تقع ضمن حدود المواصفة العراقية التي تم الاعتماد عليها في هذا البحث (( SORB R5 (المركز الوطني للمختبرات والبحوث الانشائية, 2003) حيث تراوح حد السيولة بين (44.5-47.155), كما تراوح معامل اللدونة بين (12.7-19), كذلك وجد بان الفحوصات الكيميائية لمجموع الاملاح المذابة الكلية (T.D.S), تتراوح بين (4.1-2.61), ومحتوى الجبسم بين (0.21-0.10) وهي تنطبق مع المواصفة التي تم الاعتماد عليها في هذا البحث.


Article
Suitability of Quaternary Deposits in Alam Area as Filing Materials in Earth Fills Dams
صلاحية ترسبات العصر الرباعي في ناحية العلم كمواد املائية في السدود الترابية

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Abstract

The Study aims to evaluate the suitability of quaternary deposits in AL-Alam area as filling materials in earth fill dams. The geotechnical properties of deposits for three stations show that the type of soil is (ML) and the curves of grain size analyses confirm the curve of Zone C., while the ratio of total dissolved salts(TDS) and gypsum contents ranges between (2.71-8.61)% and (0.18-0.68)% respectively The values of liquid limit and plastic limit ranges between (40.2-44.7)% and (10.5-13.7)% respectively. According to Iraqi specification, the deposits of station (3) are suitable for filling materials in earth dams, while the geotechnical properties of the deposits in the stations (1) and(2) are within the specifications ranges except the ratios of (TDS).

يهدف البحث الى بيان صلاحية ترسبات العصر الرباعي في ناحية العلم كمواد املائية حيث تم اختيار (3) محطات ممثلة لهذه الترسبات في المنطقة. اظهرت الفحوصات الجيوتكنيكية ان هذه الترسبات هي من نوع سلتية واطئة اللدونة كما تبين ان منحنيات التحليل الحجمي الحبيبي تطابق نطاق (C ) (Zone c) في ما اظهرت الفحوصات الكيميائية لمجموع الاملاح الذائبة والمحتوى الجبسي نسبا تتراوح بين (8.61-2.71)% و(0.68-0.18) % على التوالي. وتراوحت قيم حد السيولة ومعامل اللدونة بين (44.7-40.2)% و(13.7-10.5)% على التوالي ووفقا للمواصفات المواد والاعمال الانشائية للمركز الوطني للمختبرات والبحوث الانشائية (sorb/r5) لسنة (2003) تبين ان ترسبات المحطة (3) تصلح كمواد املائية بينما المحطتين (1) و(2) فان الخواص الجيوتكنيكية لترسباتها ضمن حدود المواصفة باستثناء نسب مجموع الاملاح المذابة الكلية (TDS) فانها خارج حدود المواصفة.

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